I just want to add that B-12 is often missing from or low in many omnivores’ diets too, not just vegans. Another good source of B-12 is nutritional yeast. It’s like an umami flavored (some people call compare it to cheese, but I don’t really think it has a cheese taste and don’t want to disappoint anyone) powder that you can add to whatever you want. Works really well incorporated in a recipe or just sprinkled on top of stuff.
I just want to add that B-12 is often missing from or low in many omnivores’ diets too, not just vegans. Another good source of B-12 is nutritional yeast. It’s like an umami flavored (some people call compare it to cheese, but I don’t really think it has a cheese taste and don’t want to disappoint anyone) powder that you can add to whatever you want. Works really well incorporated in a recipe or just sprinkled on top of stuff.